题目内容
. Not until _______ smoking ________ healthy lungs.
| A．did he five up, he had | B．did he give up, did he have |
| C．he gave up, he had | D．he gave up, did he have |
D
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Not unti his fellows criticized him _______ to admit his mistake.
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A．does he begin |
B．did he begin |
C．began he |
D．had he begun |
Not unti his fellows criticized him _______ to admit his mistake.
| A．does he begin | B．did he begin | C．began he | D．had he begun |